نمایش همه 4 نتیجه
Dependence of the Laminar Burning Velocity of Methane, Propane and Ethylene on Initial Temperature and Inert Diluent Concentration
Through its influencرایگان!
Through its influence on flamelet combustion, the laminar burning velocity is a crucial parameter in describing turbulent combustion. Calculations with a single chemical kinetics mechanism have determined the effect of equivalence ratio and initial temperature on the burning velocities of methane, ethylene and propane in air at atmospheric pressure. These results have been checked against available data in the literature, and then used to extrapolate to the much higher temperatures that are generally of interest in recirculating flows. Simple correlations have been developed to describe them to within 10% over the temperature range from 300K to 1100K in a convenient form for modeling purposes. Dilution of fuel by carbon dioxide is of interest in the context of synthetic and biogas fuels, and so its effect has also been computed. Comparison with dilution by nitrogen indicates the extent of CO2’s role as a reactive species.
Kinetic investigation of methane hydrate in the presence of Imidazolium Based Ionic Liquid solutions
Methane hydrate formرایگان!
Methane hydrate formation experiments in the presence of the various imidazolilium based ionic liquid solutions with 0.5wt% concentration including 1-buthyl-3-methylimidazolium methyl sulfate ([BMIM][MeSO4]) , 1-ethyl-3-methylimidazolium hydrogen sulfate ([EMIM][HSO4]), 1- ethyl-3-methylimidazolium ethyl sulfate ([EMIM][EtSO4]), 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]) and 1-(2- hydroxyethyl)-3-methylimidazolium tetrafluoroborate ([OH-EMIM][BF4]) were conducted in a high pressure reactor at the same temperature. The induction time, gas consumption and temperature were measured.The results of experiments were indicated that [EMIM][EtSO4] and [BMIM][MeSO4] had the kinetic inhibiton effects meanwhile the other ionic liquids could be able to apply as the kinetic promoters
Phase equilibrium measurements for hydrates of the CH4 /CO2 / 1, 4-Dioxane aqueous solution system
The equilibrium compرایگان!
The equilibrium compositions and properties of CO2/CH4/1,4-dioxane/water hydrate were studied for the first time at temperatures ranging from 273.65 to 281.35K and pressures ranging from 0.5 to 1.1MPa. The gas mixture consist of about 45% CO2 was used to be an exemplary for biogas and landfill gas operations. Equilibrium hydrate formation conditions for above system were measured. 1,4-Dioxane lowered equilibrium pressure by 2MPa comparing with pure water at some temperatures. This is an indication that structural transition from SI to SII was occurred
Prediction of methane hydrate equilibrium pressurs in the presence of aqueous Imidazolium-based ionic liquid solutions using Electrolyte Cubic Square Well Equation of State
Electrolyte Cubic Sqرایگان!
Electrolyte Cubic Square-Well Equation of State, eCSW EoS, based upon the Helmholtz free energy consists of the one non-electrolyte term and the two electrolyte terms. The non-electrolyte term is cubic square-well equation of state (CSW EoS) and the two electrolyte contributions consist of a Born energy and the mean spherical approximation terms. In this work, eCSW EoS is coupled with the van der Waals-Platteuw model and applied to predict the hydrate dissociation pressures of the methane+ ionic liquid+ water systems. Ferthermore, the adjustable paramers of the imidazolium based ionic liquid solutions calculated by using experimental data in litreture.A good agreement between the results of the model with the experimental data indicates the reliability of this model to predict the hydrate equilibrium conditions